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   1  <?php
   2  /**
   3   * @version        $Id$
   4   * @copyright    Copyright (C) 2005 - 2011 Open Source Matters, Inc. All rights reserved.
   5   * @license        GNU General Public License version 2 or later; see LICENSE.txt
   6   */
   7  
   8  defined('JPATH_BASE') or die;
   9  
  10  JFormHelper::loadFieldClass('list');
  11  
  12  /**
  13   * Form Field class for the Joomla Framework.
  14   *
  15   * @package        Joomla.Administrator
  16   * @subpackage    com_categories
  17   * @since        1.6
  18   */
  19  class JFormFieldCategoryEdit extends JFormFieldList
  20  {
  21      /**
  22       * A flexible category list that respects access controls
  23       *
  24       * @var        string
  25       * @since    1.6
  26       */
  27      public $type = 'CategoryEdit';
  28  
  29      /**
  30       * Method to get a list of categories that respects access controls and can be used for
  31       * either category assignment or parent category assignment in edit screens.
  32       * Use the parent element to indicate that the field will be used for assigning parent categories.
  33       *
  34       * @return    array    The field option objects.
  35       * @since    1.6
  36       */
  37  	protected function getOptions()
  38      {
  39          // Initialise variables.
  40          $options = array();
  41          $published = $this->element['published']? $this->element['published'] : array(0,1);
  42          $name = (string) $this->element['name'];
  43  
  44          // Let's get the id for the current item, either category or content item.
  45          $jinput = JFactory::getApplication()->input;
  46          // Load the category options for a given extension.
  47  
  48          // For categories the old category is the category id or 0 for new category.
  49          if ($this->element['parent'] || $jinput->get('option') == 'com_categories')
  50          {
  51              $oldCat = $jinput->get('id', 0);
  52              $oldParent = $this->form->getValue($name, 0);
  53              $extension = $this->element['extension'] ? (string) $this->element['extension'] : (string) $jinput->get('extension','com_content');
  54          }
  55          else
  56          // For items the old category is the category they are in when opened or 0 if new.
  57          {
  58              $thisItem = $jinput->get('id',0);
  59              $oldCat = $this->form->getValue($name, 0);
  60              $extension = $this->element['extension'] ? (string) $this->element['extension'] : (string) $jinput->get('option','com_content');
  61          }
  62  
  63          $db        = JFactory::getDbo();
  64          $query    = $db->getQuery(true);
  65  
  66          $query->select('a.id AS value, a.title AS text, a.level, a.published');
  67          $query->from('#__categories AS a');
  68          $query->join('LEFT', $db->quoteName('#__categories').' AS b ON a.lft > b.lft AND a.rgt < b.rgt');
  69  
  70          // Filter by the extension type
  71          if ($this->element['parent'] == true || $jinput->get('option') == 'com_categories')
  72          {
  73              $query->where('(a.extension = '.$db->quote($extension).' OR a.parent_id = 0)');
  74          }
  75          else
  76          {
  77              $query->where('(a.extension = '.$db->quote($extension).')');
  78          }
  79          // If parent isn't explicitly stated but we are in com_categories assume we want parents
  80          if ($oldCat != 0 && ($this->element['parent'] == true || $jinput->get('option') == 'com_categories'))
  81          {
  82          // Prevent parenting to children of this item.
  83          // To rearrange parents and children move the children up, not the parents down.
  84              $query->join('LEFT', $db->quoteName('#__categories').' AS p ON p.id = '.(int) $oldCat);
  85              $query->where('NOT(a.lft >= p.lft AND a.rgt <= p.rgt)');
  86  
  87              $rowQuery    = $db->getQuery(true);
  88              $rowQuery->select('a.id AS value, a.title AS text, a.level, a.parent_id');
  89              $rowQuery->from('#__categories AS a');
  90              $rowQuery->where('a.id = ' . (int) $oldCat);
  91              $db->setQuery($rowQuery);
  92              $row = $db->loadObject();
  93          }
  94          // Filter on the published state
  95  
  96          if (is_numeric($published))
  97          {
  98              $query->where('a.published = ' . (int) $published);
  99          }
 100          elseif (is_array($published))
 101          {
 102              JArrayHelper::toInteger($published);
 103              $query->where('a.published IN (' . implode(',', $published) . ')');
 104          }
 105  
 106          $query->group('a.id, a.title, a.level, a.lft, a.rgt, a.extension, a.parent_id, a.published');
 107          $query->order('a.lft ASC');
 108  
 109          // Get the options.
 110          $db->setQuery($query);
 111  
 112          $options = $db->loadObjectList();
 113  
 114          // Check for a database error.
 115          if ($db->getErrorNum()) {
 116              JError::raiseWarning(500, $db->getErrorMsg());
 117          }
 118  
 119  
 120              // Pad the option text with spaces using depth level as a multiplier.
 121              for ($i = 0, $n = count($options); $i < $n; $i++)
 122              {
 123                  // Translate ROOT
 124                  if ($this->element['parent'] == true || $jinput->get('option') == 'com_categories')
 125                  {
 126                          if ($options[$i]->level == 0)
 127                          {
 128                              $options[$i]->text = JText::_('JGLOBAL_ROOT_PARENT');
 129                          }
 130                  }
 131                  if ($options[$i]->published == 1)
 132                  {
 133                      $options[$i]->text = str_repeat('- ', $options[$i]->level). $options[$i]->text ;
 134                  }
 135                  else
 136                  {
 137                      $options[$i]->text = str_repeat('- ', $options[$i]->level). '[' .$options[$i]->text . ']';
 138                  }
 139              }
 140  
 141  
 142          // Get the current user object.
 143          $user = JFactory::getUser();
 144  
 145          // For new items we want a list of categories you are allowed to create in.
 146          if ($oldCat == 0)
 147          {
 148              foreach ($options as $i => $option)
 149              {
 150                  // To take save or create in a category you need to have create rights for that category
 151                  // unless the item is already in that category.
 152                  // Unset the option if the user isn't authorised for it. In this field assets are always categories.
 153                  if ($user->authorise('core.create', $extension . '.category.' . $option->value) != true )
 154                  {
 155                      unset($options[$i]);
 156                  }
 157              }
 158          }
 159          // If you have an existing category id things are more complex.
 160          else
 161          {
 162              // If you are only allowed to edit in this category but not edit.state, you should not get any
 163              // option to change the category parent for a category or the category for a content item,
 164              // but you should be able to save in that category.
 165              foreach ($options as $i => $option)
 166              {
 167              if ($user->authorise('core.edit.state', $extension . '.category.' . $oldCat) != true && !isset($oldParent))
 168              {
 169                  if ($option->value != $oldCat  )
 170                  {
 171                      unset($options[$i]);
 172                  }
 173              }
 174              if ($user->authorise('core.edit.state', $extension . '.category.' . $oldCat) != true
 175                  && (isset($oldParent)) && $option->value != $oldParent)
 176              {
 177                      unset($options[$i]);
 178              }
 179  
 180              // However, if you can edit.state you can also move this to another category for which you have
 181              // create permission and you should also still be able to save in the current category.
 182                  if (($user->authorise('core.create', $extension . '.category.' . $option->value) != true)
 183                      && ($option->value != $oldCat && !isset($oldParent)))
 184                  {
 185                      {
 186                          unset($options[$i]);
 187                      }
 188                  }
 189                  if (($user->authorise('core.create', $extension . '.category.' . $option->value) != true)
 190                      && (isset($oldParent)) && $option->value != $oldParent)
 191                  {
 192                      {
 193                          unset($options[$i]);
 194                      }
 195                  }
 196              }
 197          }
 198          if (($this->element['parent'] == true || $jinput->get('option') == 'com_categories')
 199              && (isset($row) && !isset($options[0])) && isset($this->element['show_root']))
 200              {
 201                  if ($row->parent_id == '1') {
 202                      $parent = new stdClass();
 203                      $parent->text = JText::_('JGLOBAL_ROOT_PARENT');
 204                      array_unshift($options, $parent);
 205                  }
 206                  array_unshift($options, JHtml::_('select.option', '0', JText::_('JGLOBAL_ROOT')));
 207              }
 208  
 209  
 210  
 211          // Merge any additional options in the XML definition.
 212          $options = array_merge(parent::getOptions(), $options);
 213  
 214          return $options;
 215      }
 216  }